Spill-proof lid



FIG. 1 is a top plan view of a spill-proof lid, showing our new design;

FIG. 2 is a left side elevational view, the right side elevational view being a mirror image thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a front elevational view thereof;

FIG. 5 is a front perspective view;

FIG. 6 is a top plan view of an alternative embodiment; and,

FIG. 7 is a front perspective view of the alternative embodiment. 

The ornamental design for a spill-proof lid, as shown and described. 